* {
    margin: 0;
    padding: 0;
    list-style: none;
}

.el-container {
    margin: 20px auto;
    width: 1158px;

    .knowledge-aside {
        width: 182px;
        height: 258px;
        background: rgba(255, 255, 255, 0.39);
        border-radius: 8px;

        .knowledge-title {
            width: 100%;
            height: 50px;
            line-height: 50px;
            text-align: center;
            border-bottom: 1px solid #F2F2F2;
            font-size: 14px;
            font-family: PingFang SC;
            font-weight: bold;
            color: #000000;
        }

        .knowledge-list {
            width: 100%;

            .list-item {
                margin-top: 18px;
                margin-left: 10px;
                width: 100%;
                font-size: 14px;
                font-family: PingFang SC;
                font-weight: 500;
                color: #6D6D6D;
                text-align: 15px;
                cursor: pointer;
            }

            .active {
                font-weight: bold;
                color: #0087FC;
                border-left: 3px solid #0087FC;
            }
        }
    }

    .content {
        // width: 100%;
        // height: 1060px;
        background: rgba(255, 255, 255, 0.39);
        border-radius: 8px;
        padding: 20px 30px;

        .content-title {
            margin-bottom: 27px;
            height: 32px;
            font-size: 22px;
            font-family: PingFang SC;
            font-weight: bold;
            line-height: 32px;
            color: #000000;
        }

        .content-desc {
            height: 78px;
            font-size: 13px;
            font-family: PingFang SC;
            font-weight: 500;
            line-height: 27px;
            color: #6D6D6D;
            margin-bottom: 20px;
        }

        .label {
            font-size: 11px;
            font-family: PingFang SC;
            font-weight: bold;
            line-height: 32px;
            color: #000000;
        }

        .content-img {
            margin-top: 27px;
            display: flex;
            justify-content: space-around;
            width: 100%;

            .img-item {
                width: 282px;
                background: rgba(0, 0, 0, 0);
                border-radius: 8px;
                overflow: hidden;

                img {
                    width: 100%;
                }
            }
        }

        .relatedVedio {
            margin-top: 48px;
            border-left: 5px solid #2D6EFF;
        }

        .vedio-list {
            width: 100%;

            .vedio-item {
                display: flex;
                width: 100%;
                height: 38px;
                margin: 30px 0;

                .vedio-img {
                    width: 16px;

                    img {
                        width: 100%;
                    }
                }

                .vedio-content {
                    margin-left: 14px;

                    .vedio-title {
                        height: 18px;
                        font-size: 16px;
                        font-family: PingFang SC;
                        font-weight: 500;
                        line-height: 18px;
                        color: #000000;
                        margin-bottom: 5px;

                        a {
                            color: #000000;
                        }
                    }

                    .vedio-msg {
                        display: flex;

                        .vedio-time,
                        .vedio-plays,
                        .vedio-icon {
                            font-size: 10px;
                            font-family: PingFang SC;
                            font-weight: 500;
                            line-height: 14px;
                            color: #6D6D6D;
                            margin-right: 20px;
                        }
                    }
                }
            }
        }
    }

    .related-practice-title {
        margin-top: 48px;
        margin-left: 24px;
        border-left: 5px solid #2D6EFF;
    }

    .related-practice {
        margin-bottom: 138px;
        .practice {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;

            .practice-item {
                position: relative;
                width: 176px;
                height: 234px;
                background: #FFFFFF;
                border-radius: 8px;
                margin-top: 20px;

                .itemImg {
                    width: 176px;
                    height: 156px;

                    img {
                        width: 100%;
                    }
                }

                .itemTitle {
                    font-size: 11px;
                    font-family: PingFang SC;
                    font-weight: bold;
                    color: #000000;
                    overflow: hidden;
                    white-space: nowrap;
                    text-overflow: ellipsis;
                    margin: 6px;
                }

                .itemType {
                    font-size: 10px;
                    font-family: PingFang SC;
                    font-weight: 500;
                    color: #606060;
                    margin: 6px;
                }

                .itemNum {
                    font-size: 10px;
                    font-family: PingFang SC;
                    font-weight: 500;
                    color: #606060;
                    margin: 6px;
                }

                .model {
                    position: absolute;
                    top: 0;
                    left: 0;
                    width: 176px;
                    height: 234px;
                    background-color: rgba($color: #000000, $alpha: 0.5);
                    border-radius: 8px;
                    display: none;

                    .collection {
                        position: absolute;
                        top: 75px;
                        left: 73px;
                        width: 30px;

                        img {
                            width: 100%;
                        }
                    }

                    .joinBtn {
                        position: absolute;
                        top: 134px;
                        left: 36px;
                        width: 104px;
                        height: 32px;
                        background: #2D6EFF;
                        opacity: 1;
                        border-radius: 4px;
                        text-align: center;
                        line-height: 27px;
                        font-size: 14px;
                        font-family: PingFang SC;
                        font-weight: 500;
                        color: #FFFFFF;
                    }
                }
                &:hover{
                    .model {
                        position: absolute;
                        top: 0;
                        left: 0;
                        width: 176px;
                        height: 234px;
                        background-color: rgba($color: #000000, $alpha: 0.5);
                        border-radius: 8px;
                        display: block;
    
                        .collection {
                            position: absolute;
                            top: 75px;
                            left: 73px;
                            width: 30px;
    
                            img {
                                width: 100%;
                            }
                        }
    
                        .joinBtn {
                            position: absolute;
                            top: 134px;
                            left: 36px;
                            width: 104px;
                            height: 32px;
                            background: #2D6EFF;
                            opacity: 1;
                            border-radius: 4px;
                            text-align: center;
                            line-height: 32px;
                            font-size: 14px;
                            font-family: PingFang SC;
                            font-weight: 500;
                            color: #FFFFFF;
                            cursor: pointer;
                        }
                    }
                }
            }

        }
    }
}